Breast pump



FIG. 1 is a top, front perspective view of a breast pump of the present invention;

FIG. 2 is a top view of the invention illustrated in FIG. 1;

FIG. 3 is a front view of the invention illustrated in FIG. 1;

FIG. 4 is a left side view of the invention illustrated in FIG. 1;

FIG. 5 is a rear view of the invention illustrated in FIG. 1;

FIG. 6 is a right side view of the invention illustrated in FIG. 1; and,

FIG. 7 is a bottom view of the invention illustrated in FIG. 1.

The dot-dot-dashed broken lines in the drawings illustrate portions of the breast pump that form no part of the claimed design. 

CLAIM The ornamental design for a breast pump, as shown and described. 